Cyberpower Zeus-M3 Ultrabook available from £737

Cyberpower is not a well-known brand in the UK and yet is a force to reckoned with in the US where it originates and has been in business for well over 14 years.

The company is selling the Zeus-M3 Ultrabook for £737 (cheaper and more expensive configurations exist). At its core is an Intel Core i5-3317U mobile processor, one with a 1.7GHz clock speed (turbo boosted to 2.6GHz), 3MB L3 cache, two cores and a TDP of only 17W.

Next to it is the Intel HD Graphics 4000 and an accompanying Mobile Intel HM77 Express Chipset. Unlike most competitors and to its credit, Cyberpower has equipped its Ultrabook with up to 16GB of RAM. Upping the onboard system memory from 4GB to 16GB only costs £42 and is an upgrade worth having.